Pencil



C. E. WEHN.

PENCIL. APPLLCATION FILED DEC.3.I918.

WITNESSES:

Patented May 6, 1919.

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Specification of Letters Patent.

Patented May 6, 1919.

Application filed December a, 1915. Serial in. 205,094.

To all whom it may concern Be it known that I, (Immune E. WnHN, a citizen of the United States, residing at the city and county of San Francisco and State of California, have invented new and useful Im rovements in Pencils, of which the followingis a specification.

This invention relates to a pencil, and particularly to that type which employs a removable and renewable lead.

One of the object of the present invention is to provide a pencil which is simple and substantial in construction, cheap to manufacture, easy to manipulate and so arranged thatthe lead may be readily changed or replaced when worn Another object of the invention is to provide means for advancing the lead, and particularly a novel form of screw feed mechanism for Ezadually advancing the lead as the point comes worn. Further objects will hereinafter appear.

The invention consists of the parts and the construction, combination and arrangement of parts as hereinafter more full described and claimed, having reference to the accompanying drawings, in which- Figure 1 isa side elevation of the pencil.

Fig. 2 is a central longitudinal section through the same.

Fig. 3 is an enlarged cross section on the line 33 of Fig.2.

Fig. 4 is an enlarged cross section on the line H of 2.

Referring to the drawings indetail, A indicates in general the pencil, which, in this instance, consists of a hollow cylindrical shell 2 and a solid and 3 which is pointed, as shown at 4, and provided with a central passaga5 for the reception of a lead 6. Formed on the opposite end of the pencil is-athread for the tion of a screw cap 7, which also-serves as" a holder for an eraser 8.

Formed withinthe shell, as at!) and 10,

area pfbearingmembersforthereception df a screw rod-11. Formed on the outer end of the rod is a flattened portion 12 which extends throu I a Similar-shaped slot 13 formed in them member 10.

i The flattened 'on 12 serv the function of'gui screw simultaneously locks the screw against movement when it isladvanoed or retracted by means nut 14"which is in between the bearing 9 and thesolid end of thapencil 8.

as The not t is rigidly locked endthe pencil and the passage is so small that it A pencil designed as here shown'may be constructed of vulcanized hard rubber, metal or any other suitable material, and, as comparatively few parts are employed, it can e quickly and readily manipulated and should also be cheap to manufacture.

In actual operation, with the lead inserted in the pencil 5, it will only be necessary to turn the nut 14 to advance the screw 11, and, as this screw is positioned in alinement with the passage 5 and is adapted to engage the inner end'of the lead, it should be obvious that it is possible to radually force the lead outwardly through t e point 4 of the pencil when the lead becomes worn away. The

screw w'll not be able to turn when the nut flattened portionsl2 fits the slot 13 in the bearing 10. Furthermore, by flattening the end of the screw rod, as shown, it becomes possible 'to utilize the space in the upper end of the cylindrical shell as a magazine for extra leads, said leads being secured against accidental removal by the cap 7, which further serves as the holder for the eraser 8. The lead employed isforced into passage 5 from the ointed end of the will. frictionally' secure the 'droppin out.

' It is t erefore necessary when desiri to change a lead or to advance the same to turn lead against I the nut; so that the screw rod will advance and force the 1 ad outwardl The' nut 14 is designedto fit t e interior 0 the shell and, as this is comparatively thin, it can readily be seen that the slots 15 through which the nut is manipulated will not necessarily have to be very large. Furthermore, it will be impossible to lose the nut as it is secured against endwise movement and is too large to become displaced by passing through t e slots. The only remove le members are the. ca -7 and-the screw rod 11.

llVhile a more or-less specific design and construction are here shown I wish it understood that this may be chan ed'to. suit varying-conditions. Similarly, at-the materials and finish of the several salts may be such as the experience and in gment of the manufacturer ma dictate.

Having thus descri (1 my invention, what I claim and desire to secure by Letters Patent is:

1. A ncil including a shell, a pair of spaced rii mbers in the shell One having an aperture and the other a non-circular aperture, an extension on one end of the shell having a lead receiving. assage and havin its inner end arranguf adjacent to an spaced from one of said members, a threaded rod extending through said member having the aperture and having a portion conforming to and slidable through the memher with the non-circular aperture, and a nut on the rod mounted between the first named member and the inner end of the extension.

2. A pencil including a shell, a pairof spaced members the shell one having an aperture and the other. a non-circular aperture, an extension on one end of the shell having a lead receiving assage and havin its inner end arrang ad acent to and spaced fi'omone of said members, a threaded rod extending through said member having the aperture and having a rtion conforming to and slidable throug the mem her with the non-circular aperture, and a nut on the rod mounted between the first named member and the inner end of the extension, said second named member being spaced from the opposite end of the shell to provide a wall to permit leads to be stored in the shell and to engage said leads to re strict movement thereof within the shell.

3. A pencil including a shell, 0. lead en; gaging threaded rod in the shell, a nut for advancing the rod, a member in the shell, and means between the rod and member to hold the rod against turning, said member being spaced at such distance from an end of the shell to permit leads to be stored in the shell and to engage said leads to restrict movement thereof within the shell.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

. CHARLES E. WEHN Witnesses:

W. W. Hnansg', 1 M. E. E ING. 

